import {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} from "dhtml-weixin"
import * as THREE from './three/Three';

import Stats from 'three/addons/libs/stats.module.js';

import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { OrbitControls0 } from 'three/addons/controls/OrbitControls0.js';
import { TGALoader } from 'three/addons/loaders/TGALoader.js';
var requestId
Page({
  onShareAppMessage(){
    return getApp().onShare()
  },
  onShareTimeline(){
     return {title:"ThreeX 2.0"}
  },
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2").then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {

    let camera, scene, renderer, stats;

    init();
    animate();

    function init() {

      const container = document.createElement( 'div' );
      document.body.appendChild( container );

      camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 100 );
      camera.position.set( 0, 1, 5 );

      scene = new THREE.Scene();

      //

      const loader = new TGALoader();
      const geometry = new THREE.BoxGeometry();

      // add box 1 - grey8 texture

      const texture1 = loader.load( 'textures/crate_grey8.tga' );
      texture1.colorSpace = THREE.SRGBColorSpace;
      const material1 = new THREE.MeshPhongMaterial( { color: 0xffffff, map: texture1 } );

      const mesh1 = new THREE.Mesh( geometry, material1 );
      mesh1.position.x = - 1;

      scene.add( mesh1 );

      // add box 2 - tga texture

      const texture2 = loader.load( 'textures/crate_color8.tga' );
      texture2.colorSpace = THREE.SRGBColorSpace;
      const material2 = new THREE.MeshPhongMaterial( { color: 0xffffff, map: texture2 } );

      const mesh2 = new THREE.Mesh( geometry, material2 );
      mesh2.position.x = 1;

      scene.add( mesh2 );

      //

      const ambientLight = new THREE.AmbientLight( 0xffffff, 1.5 );
      scene.add( ambientLight );

      const light = new THREE.DirectionalLight( 0xffffff, 2.5 );
      light.position.set( 1, 1, 1 );
      scene.add( light );

      //

      renderer = new THREE.WebGLRenderer( { antialias: true } );
      renderer.setPixelRatio( window.devicePixelRatio );
      renderer.setSize( window.innerWidth, window.innerHeight );
      container.appendChild( renderer.domElement );

      //

      const controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
      controls.enableZoom = false;

      //

      stats = new Stats();
      container.appendChild( stats.dom );

      //

      window.addEventListener( 'resize', onWindowResize );

    }

    function onWindowResize() {

      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();

      renderer.setSize( window.innerWidth, window.innerHeight );

    }


    function animate() {

      requestId = requestAnimationFrame( animate );

      render();
      stats.update();

    }

    function render() {

      renderer.render( scene, camera );

    }

  }
})